Pumpkin of Spirits [Spooktober Jam]

This is my first Godot game for Spooktober Jam.

The idea of the game is to sacrifice spirits and receive spirit essence for it.

Rules:

Spirits fly in the world and are interested in your magic pumpkin and begin to fly next to it, you can see the spirit sprite and two numbers next to it, the upper one is the number of spirits that are next to the pumpkin, the lower one is the limit of spirits, the number of spirits that able to withstand your astral-witchcraft body and mind. 

Clicking at the pumpkin you sacrifice the spirits in it and turn them into a spiritual essence, for it you can buy upgrades:

Spirits Attraction - the number of spirits that are attracted every five seconds.

Spirits Limit - the number of spirits that you can withstand, if it is somehow exceeded, it will damaged you.

Pumkinization - the maximum number of spirits that can be melted in a pumpkin at a time.